1--c-d-eef--dd-d--dc-d-fe-dff-dc--fh-gh-

1--cd-dhk-h--h-hghkhg--f--g-hfgff-d-

1--g-gk-h--hg-f-gh-g--k--k-

1--ddf-d-d--df-d--d-dc-d-f--g-f-